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should i.........
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Author:  MINIRO [ Mon Mar 29, 2004 7:15 pm ]
Post subject:  should i.........
..........stay with my 10 inch wheels and get disc's to suit or go 12 inch wheels and get bigger discs? what is the widest 12's i can put on before i start having to hack into the body?

thanks in advance

Rohan
Author:  -=MiniMafia=- [ Mon Mar 29, 2004 7:38 pm ]
Post subject: 
hey man, if it was me, I would stay with 10s, and get some good disc brakes for her!
Author:  min13k [ Mon Mar 29, 2004 7:43 pm ]
Post subject: 
13 inch b4 you need to hach the bodie
makka
Author:  tzi [ Mon Mar 29, 2004 7:48 pm ]
Post subject: 
surely it cant be good for the gear ratios changing wheel size that much.

Can you get 12in in a correct profile tyre to keep the diameter the same?
Author:  min13k [ Mon Mar 29, 2004 7:50 pm ]
Post subject: 
you can also i think from memory the rolling diamiter of the 13's is close to the 10
Author:  mutant mini [ Mon Mar 29, 2004 7:58 pm ]
Post subject: 
You just need to keep the rolling diameter the same when changing wheel size and tyres.

For instance:
10 x whatever the normal tyre size is
equals
165/60/12 tyres and wheels to suit (these fit on 12 x 5.5)
or
175/50/13 tyres and wheels to suit (these fit on 13 x 5.5)
or 195/45/13 tyres and wheels to suit (these fit on 13 x 7 wheels) superlite performance.
Performance make Superlites in all of the correct off sets for the mini.
Author:  drmini in aust [ Tue Mar 30, 2004 11:13 am ]
Post subject: 
I've got 175/50-13s on my boat trailer....
I parked a Mini wheel with 165/70-10 Falken fitted, next to it- the 13" was way bigger. They are NOT the same rolling diameter, with 50 series rubber, anyhow. 8)
Author:  leyland74 [ Tue Mar 30, 2004 12:00 pm ]
Post subject: 
This might help, it's a calculator for keeping the same rolling diameter.
http://www.miata.net/garage/tirecalc.html

So if stock tyres are 165/70/10's then if you go to 12's you'd need 165/55/12's to stay the same.

Though I thought stock is 145/70/10 so you'd need 170/45/12's or 180/35/13's


Another thing to consider is that you need to have a certain load rating as well for street cars at least otherwise they are not street legal, can't remember what the figure is, don't know if it's different for different cars.
Author:  dr trim [ Tue Mar 30, 2004 12:38 pm ]
Post subject: 
ok so what do those first 2 numbers mean?
Author:  marconi [ Tue Mar 30, 2004 2:23 pm ]
Post subject: 
Tyre sizes are:- Width of tread in MM/ pecent of width inHight(profile) / Rim dia in inches
Only thing I know of that is measured in Metric & imperial.
Author:  poeee [ Tue Mar 30, 2004 4:45 pm ]
Post subject: 
850pvan wrote:
ok so what do those first 2 numbers mean?


U mean 165/60/12? If yes, then the first number is the width, the second is the profile (how thick the tyre is from the wheel to the tread) and 12 is obviously the diam. of the wheel.

Edit... ya beat me to it, Marconi!
Author:  drmini in aust [ Tue Mar 30, 2004 5:38 pm ]
Post subject: 
Actually the profile is the ratio of tyre section height, to tyre width.
Different width tyres therefore have a different actual height, even though they are both (say) 70 profile.. wider ones are taller.
Author:  PhildoD [ Tue Mar 30, 2004 5:57 pm ]
Post subject: 
Thats correct, the second pair of numbers is commonly called the "series". This is the sidewall height. The number is the percentage of the tyre width (the first number).

eg 165/50-13 would be 165 mm wide, 82.5 mm sidewall height, and designed to fit a 13 inch wheel.
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